English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The production of crops in controlled environments is a growing sector of modern agriculture. The objective of this study was to determine the optimal concentration of culture nutrient solution for the production of carrot leaves in a closed-type plant factory. After sowing, seedlings at the two-true-leaf stage were transplanted to a growing bed system. Hydroponic cultivation was performed using a three-layer NFT system. Culture nutrient solutions were supplied at three electrical conductivity (EC) levels (2.0, 3.0, and 4.0 dS·m-1). Measurements of plant growth characteristics, including fresh weight, dry weight, plant height, and leaf area, were performed 14 and 23 days after planting. Differences in culture nutrient solution concentrations did not affect leaf number and chlorophyll content, and did not cause significant difference in antioxidant capacities and total phenol content of carrot plants. However, contents of total phenol, chlorogenic acid, and kaempferol were highest in plants grown in the EC 2.0 dS·m-1 solution, whereas those grown in the EC 3.0 dS·m-1 solution had the highest fresh and dry weights. Collectively, our results indicate that an EC 3.0 dS·m-1 culture nutrient solution combined with a cultivation period of 20-25 days is optimal for the hydroponic cultivation of carrot leaves in a controlled environment. In addition, we found that carrot leaves contain antioxidant compounds and are thus suitable as a leaf vegetable. Additional key words: antioxidant capacity, chlorogenic acid, cultivation days, kaempferol, total phenolic compounds

Effect of Different Culture Nutrient Solution EC onCarrot Top Growth and Nutritional Contents in aClosed–type Plant Factory System